Transmission mechanism



' Jan. 1251926. 1,569,516

J. F. MANGHAM Tmmsur'ssron uscmnrsu Filed Deo. 11, 192: 2 sheets-sheet 1 Jan. l2; 1926. .1,569,516 J. F. MANGHAM mnsurssron ucaAuIsu Filed Dec.. 11, 4192;- 2 Sheets-sheet 2 Patented Jan. 12, 1926.

UNITED STATES JOHN F. MANGHAM, OF EL PASO, TEXAS.

TRANSMISSION MECHANISM.

Application filed December 11, 1923.

To all whom it may concern.'

Be it known that I, JOHN F. MANGHAM, a citizen of the United States, residing at El lPaso, in the county of El Paso and State of Texas, have invented certain new and useful Improvements in Transmission Mechanisms, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to transmission mechanism of the clutch type for imparting rotary movement from one rotary or oscillatory shaft or other member to another.

It is an object of the invention to provide an automatic transmission mechanism of a toothless ratchet form so arranged that 'one shaft or other member may be driven by another in either direction and one permitted to turn in the opposite direction inblependently of the other and the latter permitted to remain at rest or to turn in the `driven direction, and also so arranged that both members may be locked together whereby either may drive or be driven by the other in both directions.

lVhen considered in connection with the description herein, the characteristics of the invention will be apparent from the accompanying drawings, forming part hereof, wherein an adaptation of the invention is disclosed, for purposes of illustration.

Although the disclosures herein exemplify what now is considered to be a preferable embodiment of the invention, it is to be understood that it is not the intention to be limited necessarily thereto in interpretation of the claims, as modifications and adaptations within the limits of the claimscan be 4o vmade without departing from the nature and spirit of the invention.

Like reference-characters refer to corresponding parts in the views of the drawings, of which- 45 Fig. 1 is a sidefelevation of the assembled mechanism;

Fig. 2 is a longitudinal section thereof;

Fig. 3 is an end elevation ofthe female member;

Fig. 4 is an end elevation of the male member with certain movable parts in place therein;

Serial No. 679,995.

Fig. 5 is a side elevation of the male member;

Fig. 6 is a front elevation of one of the dogs; n

Fig. 7 is a side elevation of one of the dogs; and

Fig. 8 is a side elevation illustrative of employment of swingable members with the mechanism.

Having more particular reference to the drawings, 9 designates a shaft, which has on one end a disk-like member 10 formed with a plane surface 11 presented on the side opposite to the shaft and disposed at right angles to the shaft axis. The member 10 is formed with an annular flange 12 extending beyond the surface 11 on the side opposite to the shaft, and this flange has an inner bearing surface 13 concentric with the axis of the shaft. In the embodiment disclosed herein, the shaft, the member 10, and the flange 12 are of integral formation, and the member and flange constitute the female member of the mechanism. A seat or recess 14, concentric with the axis, extends inwardly from the plane surface 11, for a purpose hereinafter explained.

A shaft 15 has fast thereon a disk-like member 16 formed with a plane surface 17 disposed at right angles to the shaft axis and presented on the side opposite to the shaft. The member 16 is formed with an annular flange 18 extending beyond the surface 17 on the side opposite to the shaft 15 and having its outer periphery concentric with the axis and arranged to lit closely into the flange 12 and to have rotary movement therein. The flange 18 extends for the major distance around the periphery of member 16-say between five-sixths to fourfifths the distanceso that there is afforded a side opening between the flange terminals for a purpose hereinafter explained. A centrally-positioned boss 19 extends from the inner side of member 16, and therefrom projects a concentric extension 20 arranged to fit closely and to rotate in the seat 14. The member 16 and the parts thereon constitute the male member of the mechanism, and they preferably are of ini tegral formation. The part 20 journaled in seat 14 holds the male and female members in coaxial relation. The end of boss 19 is arranged to bear against the inner surface of the member 10, and the parts are proportioned in such manner that,iwhen the boss is in such contact, the opposite side of the member 16 is substantially in the same plane as the end surface of thelange 12.

The male and female members of the mechanism are held together' by a iat ring 21, which overlaps therouter suriace of the member 16 and is helden the flange 12 by i screws 22 or astenings. i

rlhe boss 19 has in its side oposite to the center of the opening' through the 'flange 1S adjacent axially-disposed seats or grooves 23, in each of which bears the smaller end of` one ottwo wedge-shaped dogs 2li. The opposite'end oil each dogl is formed with a bearing vsnriace +3,`which isdisposed in other suitable removable an arc whose center is to the side otheaxis corner of the dog; 1n order that recession of the dog.` 'llliereiormfthe distance `from the boss end oit the dog decreases Ytrom one end oi the bearin suiiaceto the other. rfhat is, the bearing i surface' recedes from an arc centered in the boss recess and having as its radius `the distance therefrom to the end of the dog at one side. By reference to lig. 6, it will be seen that` the recession isgtrcm point r to point r', each point being at a of the bearing surface. may not be toogreat, it has been found to be preferable in prac-` tice to describe the are of the dog bearing surface on a center that is beyond the opposite end df the dog, as shown at ,c in F ig. 5.

lVhen the mechanism is assembled, the shorter sides ot `the dogs face. each other. The dogs extend into the opening between the terminals of the flange 19s;` they lare swingable between those terminals; and,

i the portion of thatv bearing surface that may be adjacent to those terminals.` Consequently, when a dog swingstoward the median position between the terminalsof flange 18, its bearing surface is wedged against the bearing surface 13 and `rotarymotion is imloarted from the driving to the driven'inemer of the mechanism.

In order to Vlreep one or both dogs in median and clutching position, a U-shaped spring 2G is secured between its ends to "the boss 19 in any suitable manner', as by being disposed in a slot 19a as shown, and the ends of the spring bear against the outer sides of the dogs and tend to move them toward each ,.other.' n c c c A key member 27, on a shaft 28 extending through the member 16 and turnable by a lthumb-piece 29 on the shaft, is operable to contact with and toswing either of the dogs away from median position to inactive position and to hold it in the latter position.

Then both dogs are in median or active position, the twov clutch members are locked against relativemovement in either direc-` tion, onel dog resisting eitort exerted in `one direction and the otherdog in the other: direction, `as both are in positions to'be, wedged against the, bearing `surface 13. With the key! turned to hold one dog in in?` active position, theother dog will bewedged against tl'iebearing surface `lwhenthei eltort of one of the clutch members "in, the direction to movethe ,dogttowardmee dian position, and, consequently, the other clutch member is driven; and, when the driving clutch memberis `turned in the other directiomrthe active dog. will swing andre lease its clutching action and the driven clutcl'i` member will remain at rest or con-` tinuetoerotate in thewdrven direction in` accordance with the other'` parts with which itis associated. i. Y f i i c `The clutch members hereinbefore, have een described as associated `with shafts, one arranged to drive and the otherto, be driven by the mechanism. .It is to beunderstood, however, that the invention is not limited to association with rotary shafts. Y For eX-' ample, as shown by Fig. l8, one of the clutch members may be` associated with anall'm or lever 30 by which rotary movement is imparted thereto. or which `receives swinging movement from the member, "the other clutch member turning .or "being turned when the lever moves `or isjmoved in" one direction, or it turns `when Ithe leverv moves in both directions, dependent upon the con'- dition ot the dogs as controlled by the key.

Having Vthus `described. my invention, whatlclaim as new, and desire to secure by Letters "Patent, is-` A i c i V 1. A transmission mechanismfcomprising a clutch member having an internal annular bearing surface, anotherfclutch member `rotatable inside otsaid bearing surface, aboss on said. latter member, and two adjacentlypositioned dogs bearing against said Vboss A and one of them being arranged `to engage frictionally-` against Vsaid bearing `surface whenrelative etfortV of said clutch members is in one direction andtheother dogbeing arranged to have like engagement when re1- ative el'lort is inthe opposite direction, said dogs being swingable away from each other out of such engagement.

2. A transmission mechanism comprising a clutch member having an internal annular bearing` surface, another clutch member 1'0- tatable inside of said bearing surface, a boss 6 on said latter member, two adjacently-positioned dogs bearing against said boss arranged to engage frictionaily against said bearing surface and being swingable away from each other out of such engagement, and a turnabie member between said dogs 10 arranged to hold either of them in inactive position.

In testimony whereof I aix my signature.

JOHN F. MANGHAM. 

